Manufacture and production of a caoutchouc-like material.



I No Drawing.

UNITED STATES PATENT OFFICE.

1101mm) DELBR'liGK annxun'r mmsnnnonc, or ELBnnrELn, GERMANY, Assmmons T0 FABIBENFABRIKEN VOBM. FBIEDR. BAYER & 00., 0F ELIBERFELD, GERMANY, A

CORPORATION OF GERMANY.

mniwrac'runn AND rnonuc'non'or h cAou'rcnouc-Lmn MATERIAL.

Specification of Letters I Patent.

Application filed December 28, 1912. Serial No. 738,280.

Patented Oct. 1913.

the Manufacture and Production of a Caout chouc-like Material, of which therfollowing is a specification.

We have found that the product of auto polymerization ofbeta gamma dimethylerythrene, obtained by allowing the hydroi by hea carbon to stand about one year by itself (Kondakow, J oumal fz'ir Praktieche Ohemz'e,

vol. 64, pp. 109-110) and which is a whitish, spongyz brittle substance, can be. converted mg, preferably. under pressure, into a technically valuable elastic caoutchouc like product which isprobably identical to that obtained by. heating beta-ganima-dimethylerythrene.

In order to illustrate the new processmore' fully the following example is given: The roduct. of autopolymemzation is heated ring 8 hours in' a closed" ironvesel to from 150-200? 0.; A' compact elastic mass is thus obtained.

We claim 1. The process of'producing a valuable elastic caoutchouc-like substance,-which com-j prisesheating the product of'autopolymerization of beta: gamma dimethylerythi'ene until the brittleness ofsuch product has been overcome and an elastic substance obtained.

2.-'The process of producing a valuable elastic caoutchouc-like substance, which oomprisesjheating under pressure the product of auto'polymenzation of beta gamma dimethylerythrene until the brittleness of such product has been overcome'and a'compa'ct elastic substance obtained.

3. The process of producing a valuable elastic caoutchouc-like substance, which comprises heating'to' from 150 to- 200 C. the product of autopolymerization of betagamma dimethylerythrene until the brittleness of such product has been overcome and an elastic substance obtained.- 4; The process of producing a valuable elastic caoutchouc-like substance, which comprises heating under pressure to from 150 to 200 C.the product of autopolnymerization of beta-gainma-dimethylerythrene' until the tained.

In testimonyj'whereof we have hereunto set our hands" inthe presenceof two subscribing witnesses.

. KoNnAD-DnLBRfick. 1. 5.] KURT "MEISENBURG. 1,.

nmiq New,

Armani NUFER;

brittleness of such product has been overcome and a compact elastic substance ob- 

